What happens in a stress test?

In a stress test the doctor compares symptoms, your ecg, and images of your heart both at rest and after exercising. The heart can be exercised via treadmill or if unable to use a treadmill using chemical to simulate exercise. You should expect to to be present for 2-3 hours. You will need to lay flat, preferrably with your arms above your head, for a set of resting images and a second set of images after stress.